Apparatus for making pulp vessels.



\ PATENTED APR'. 2l', 1903.. F. B. HOWARD. APPARATUS POR MAKING PULP VESSELS.

APPLIUATIQN FILED JAN. 16. 1902.

No. 725,966.v

no MODEL.

' PATPNTED APR. 21, 1903.

. P. B. HOWARD. APPARATUS PoR MAKING PULP VEssPLs.

APPLICATION FILED JAN. 1 6, 1902.

2 SHEETS-SHEET 2.

' l N MODEL.

. ma Noms Parsns co., woromwc.. wAsHmn'mN. n. r,

UNITED i., STATijs"l PATENT OFFICE.

FRANK B. HOWARD, OF NEV YORK, N..Y., ASSIGNOR TO LAFLN la RAND ing pulp vessels, with the object in View of POVYDER 4`COMPANY, YORK.

OF NEV YORK, N. Y., A CORPORATION OF NEW APPARATUS Fon MAKINGy vPULPWisst-:13.

sPnoIFIcATroN formingart of Lttesgratent No. 725,966, dated April 21,' 190s.

i i Application filed January 16, 1,902. Serial No. 90,028. (No model.)

the borough of Manhattan, in the city andi State of New York, have'invented a new and nsefulApparatus for Making Pulp Vessels;

of which the following is a specification.

My invention relates to apparatus for makproviding efficient and expeditious means for forming vessels of this character and more particularly the smaller-sized vessels.

molds into and Vout of a tank of pulp while the molds are connected with a suitable vacuum appliance.

v A In the accompanying drawings, Figure l represents in detail, in vertical section, one

ed within a tank of pulp held in suspension. Fig. 2 is a vertical section -in the plane ofthe line A A of Fig. l, taken at right angles to, i

the section shown in Fig. l. Fig. 3 representsa similar View of a modified form ofA mold. Fig. lrepresents, in side elevation,thef means for lowering andraising a plurality of;

the molds into and out of the pulp-receptacle;

and Fig. 5 is a view of the same, showing the pulp-receptacle in transverse section.

Referring to Figs. 1 and 2, a represents a tank for holding pulp in suspension, 'the' height at which the pulp in suspension is maintained within the tank being denoted by the dotted line X X. The mold for forming the vessel consists in the present instance of two parts b c, hinged together at dand opening along the line e. (Clearly indicated in Fig. 4.) The parts may be locked together by a snap-fastening f. The mold is provided with a hollow interior space g, the inner Wall b' of themold being-provided with numerous perforations and with a lining h, formed of wire-gauze.

The mold shown in Figs. 1 and 2 is designed to form a flattened ask with a nozzle, and the interior-"of the' mold` is shaped with this in View. The chamber g, which surrounds the inner perforated Wall of the mold, is in communication through a mouth z' and nipple] with the interior o'f a pipe 7c, leading to a suitable vacuum-forming appliance ofany known or approved form. (Notshown herein.) The wall of the mouth i is intended to iit snugly on the tapered nipplej, so as to hold the mold suspended by frictional contactinorder that the mold may be readily removed for the purpose'of substituting another for it or, readfg'usting it for another operation after the V-pulp vessel has been' removedV from its in- `t'erior.

The apparatus,broadly considered, consists in means for lowering and raising one or more The pipe 7c, leading to the vacuu rn appliance, is, together with'the molds attached thereto, suspended from :a rotary shaft Z by means of chains m m', which lead from the pipe 7c up and over sprocket-wheels n n on the shaft Z and thence down to counterbalance-weights o o'. One of the {weights-for example, the weight o-may be provided with ahandle o2 for the purpose of enabling the operator to lower andA 'raise the pipe lo, with the molds attached thereto, into and out of the pulp-containing tank a.

The mold represented in Fig.13 is attached V-,to the pipe 7o in the samey manner as the mold falready'described and is introduced simply for the purpose of showing another of numerpus forms of mold whichmay be used in this connection. In fact, anyfform of mold whatlever may be employed tosuitfthe size and shape ofthe pulp vessel'to .be molded. y

'. The form of mold shown in Fig. 3 is adapted to form a pulp vessel of cylindricalv form lopen at one end and closed at fthe opposite end. For this purpose the interior perforated wall p' of the mold p is made cylindrical in shape, with its lower end opened, and the vacuum-chamber p3 is formed between the inner perforated wall p and outerwall p2 of the mold.

In operation, the molds havingbeen placed in position, they are lowered until their open ends are immersed within the suspended pulp within the tank, and then vacuum isestablished within the pipe Za and lfrom it through the nipples j and mouths in the space surrounding the perforated. wall of 'themold, thereby causing the suspended pulp to rise within the mold and seek to escape through the perforated wall of the mold and by so do- ICO ing deposit itself in a compact layer along the inner wall of the mold up to the limit of the pressure established by the tank on the eXterior. The Water which is drawn through the perfor-ations while the pulp is being deposited on the inner wall of the mold passes along the pipe L and through the suction-pump or other vacuum appliance out of the way. When the pulp has been deposited to a sufficient extent to form the wall of the vessel, the molds are lifted out of the tank and removed from their nipples j to a suitable drying apparatus, and

- other molds maybe substituted in their place,

so that the operation of forming the vessels may be continued While the drying is going on, or the drying may take place suicient to permit the pulp Vessel to be removed from the mold,and then the mold in whichit was formed may itself be replaced on its nipple and another Vessel formed.

It is obvious that the means for raising and lowering the molds and for connecting them to the vacuum appliance is only one of numerous forms which maysuggest themselves to a person skilled in the art. Hence I do not wish to limit myself strictly to the structure herein shown and described; but

VV'hat I claim isl. Apparatus for molding pulp vessels comprising a mold having interior perforated walls and vacuum-chambers surrounding the interior perforated walls, the said molds heing composed of sections arranged to open to permit the discharge of the molded article, a pipe leading to a Vacuum appliance, means for removably attaching the mold to the pipe leading to the vacuum appliance and means for lowering and raising the mold while attached to the pipe.

2. Apparatus for molding pulp Vessels comprising a vacuum-chamber common toa plurality of molds, the said vacuum-chamber being provided with nipples one for each mold, molds provided with tapered mouths adapted to frictionally engage the said nipples in removable adjustment,the said molds being provided with perforated interior walls and vacu- 11m-chambers surrounding the said perforated walls and means for raising and lowering the said common vacuum-chamber and hence the molds attached thereto.

In testimony that I claim the foregoing as my invention I have signed my name, in presence of two witnesses, this 11th day of January, 1902.

FRANK B. HOWARD.

Witnesses:

FREDK. HAYNEs, HENRY THIEME. 

